Ofc it's subjective, but 60hz is 60hz, 9000fps would still be 60 different images per second.
If the game isn't smooth with 60fps, it's the game not running smooth itself, as it is the case with minecraft (to name a extreme).
You forgot the better contrastOn topic: I'd personally go with the IPS. TN absolutely doesn't compare. IPS was made to replace TN, particularly in reference to the viewing angle. As a "side effect", you get more vivid colours. I haven't used a TN panel in years, and i honestly wouldn't go back to them. General IPS panels at 1080p are cheap enough and readily available that buying TN isn't something i'd consider.
But really, after having and IPS, a TN just wouldn't be fun to have anymore.